}//学生按教师编号查询全班学生成绩
public int SearchScoreStu(string userNo, out DataTable objDataTable, out string strErr)
{
int iReturn = 0;
strErr = "";
objDataTable = new DataTable();
SqlCommand sqlCom = new SqlCommand();
string strCom;
Model.Score.Score objScore = new Model.Score.Score();
strCom = "select stuNo 学生编号,stuName 学生名称,courseName 课程名称,Class.className 班级名称,score 得分 from student,class,score,course,class_course where class.classid =(select class.classid from class,student where stuNo = '";
strCom += userNo + "'and student.classId=class.classId )and score.stuId = student.stuId and course.courseId = score.courseId and class.classid =class_course.classId and class_course.courseid = course.courseId and score.Type = 1 and student.Type = 1 and course.Type =1";
sqlCom.CommandText = strCom;
sqlCom.Connection = sqlCon;
SqlDataAdapter sqlDa = new SqlDataAdapter(sqlCom);
try
{
sqlDa.Fill(objDataTable);
iReturn = 1;
}
catch (Exception ex)
{
strErr = ex.ToString();
iReturn = 0;
}
finally
{
sqlDa.Dispose();
sqlCom.Dispose();
}
return(iReturn);
}//学生登陆后，绑定表里显示的数据
public int ModifyScore(Model.Score.Score objScore, out string strErr)
{
int iReturn = 0;
strErr = "";
SqlCommand sqlCom = new SqlCommand();
sqlCom.Connection = sqlCon;
string strSql = "update score set score = " + objScore.score.ToString();
strSql += "where CourseId = " + objScore.CourseId.ToString() + "and StuId = " + objScore.StuId.ToString();
sqlCom.CommandText = strSql;
try
{
sqlCon.Open();
sqlCom.ExecuteNonQuery();
iReturn = 1;
}
catch (Exception exErr)
{
strErr = exErr.ToString();
iReturn = 0;
}
finally
{
sqlCon.Close();
sqlCom.Dispose();
}
return(iReturn);
}
}//管理员按教师编号查询所有学生的成绩。
public int SearchScore(out DataTable objDataTable, out string strErr)
{
int iReturn = 0;
strErr = "";
objDataTable = new DataTable();
SqlCommand sqlCom = new SqlCommand();
string strCom;
Model.Score.Score objScore = new Model.Score.Score();
strCom = "select distinct student.stuNo 学号,student.stuName 学生姓名,course.courseName 课程名称,course.courseno 课程编号, score.Score 得分 from student,score,course where score.stuId = student.stuId and course.courseId = score.courseId and score.Type = 1 and student.Type = 1 and course.Type =1";
sqlCom.CommandText = strCom;
sqlCom.Connection = sqlCon;
SqlDataAdapter sqlDa = new SqlDataAdapter(sqlCom);
try
{
sqlDa.Fill(objDataTable);
iReturn = 1;
}
catch (Exception ex)
{
strErr = ex.ToString();
iReturn = 0;
}
finally
{
sqlDa.Dispose();
sqlCom.Dispose();
}
return(iReturn);
}//管理员登陆后，查询所有成绩表里的记录。
public int AddScore(Model.Score.Score objScore, out string strErr)
{
int iReturn = 0;
strErr = "";
SqlCommand sqlCom = new SqlCommand();
sqlCom.Connection = sqlCon;
string strSql = "insert into score(CourseId,StuId,Score,Type)";
strSql += "values (" + objScore.CourseId.ToString() + "," + objScore.StuId.ToString() + "," + objScore.score.ToString() + ",1)";
sqlCom.CommandText = strSql;
try
{
sqlCon.Open();
sqlCom.ExecuteNonQuery();
iReturn = 1;
}
catch (Exception exErr)
{
strErr = exErr.ToString();
iReturn = 0;
}
finally
{
sqlCon.Close();
sqlCom.Dispose();
}
return(iReturn);
}
//添加成绩信息
private void btnSave_Click(object sender, EventArgs e)
{
string strErr = "";
Model.Class.Class objClass1 = new Model.Class.Class();
Model.Student.Student objStudent1 = new Model.Student.Student();
Model.Course.Course objCourse1 = new Model.Course.Course();
objClass1.ClassNo = cmbClassName.SelectedValue.ToString();
objStudent1.StuId = int.Parse(cmbStuNo.SelectedValue.ToString());
objCourse1.CourseId = int.Parse(cmbCourseName.SelectedValue.ToString());
string strConnection = System.Configuration.ConfigurationManager.ConnectionStrings["StudentManager"].ConnectionString;
Manage.Score.Score objSco = new Manage.Score.Score(strConnection);
int i = objSco.Judge(objStudent1, objCourse1); // 判断是否存在所选的成绩，如果为0，表示不存在记录，可以增加。为1表示存在记录，不能重复插入成绩。
if (i == 0)
{
Model.Score.Score objScore = new Model.Score.Score();
Model.Student.Student objStudent = new Model.Student.Student();
Model.Course.Course objCourse = new Model.Course.Course();
objScore.CourseId = int.Parse(cmbCourseName.SelectedValue.ToString());
objScore.StuId = int.Parse(cmbStuNo.SelectedValue.ToString());
objScore.score = float.Parse(nudScore.Value.ToString());
objScore.StuName = txtStuName.Text;
int iRent = objSco.AddScore(objScore, out strErr);
if (iRent == 0)
{
MessageBox.Show(strErr);
return;
}
else
{
MessageBox.Show("添加成功");
this.Visible = false;
BindClassId();
BindStuId();
BindCourseId();
}
}
else
{
MessageBox.Show("不能重复插入分数");
}
}
//修改成绩信息
private void btnSave_Click(object sender, EventArgs e)
{
string strErr = "";
Model.Student.Student objStudent1 = new Model.Student.Student();
Model.Course.Course objCourse1 = new Model.Course.Course();
objStudent1.StuId = int.Parse(txtStuNo.ToString());
objCourse1.CourseId = int.Parse(txtCourseNo.ToString());
string strConnection = System.Configuration.ConfigurationManager.ConnectionStrings["StudentManager"].ConnectionString;
Manage.Score.Score objSco = new Manage.Score.Score(strConnection);
int i = objSco.Judge(objStudent1, objCourse1); //返回为0，表示不存在该成绩记录，不能修改。返回为1，表示存在记录，可以修改。
if (i == 1)
{
if (DialogResult.Yes == MessageBox.Show("真的要修改该成绩吗？", "确认修改", MessageBoxButtons.YesNo, MessageBoxIcon.Question))
{
string strEr = "";
Model.Score.Score objScore = new Model.Score.Score();
Model.Student.Student objStudent = new Model.Student.Student();
Model.Course.Course objCourse = new Model.Course.Course();
objScore.CourseId = int.Parse(txtCourseNo.ToString());
objScore.StuId = int.Parse(txtStuNo.ToString());
objScore.score = float.Parse(nudScore.Value.ToString());
int iRent = objSco.ModifyScore(objScore, out strErr);
if (iRent == 0)
{
MessageBox.Show(strEr);
return;
}
else
{
MessageBox.Show("修改成功");
//BindDataGridView();
this.Visible = false;
}
}
}
else if (i == 0)
{
MessageBox.Show("当前要修改的成绩不存在，请确定后再修改");
}
}
}//学生登陆后，绑定表里显示的数据
public int Judge(Model.Student.Student objStuId, Model.Course.Course objCourseId)
{
string strErr = "";
Model.Score.Score objScore = new Model.Score.Score();
DataSet ds = new DataSet();
string strConnection = System.Configuration.ConfigurationManager.ConnectionStrings["StudentManager"].ConnectionString;
string strSql = "select Score from score where stuid='" + objStuId.StuId.ToString() + "'and CourseId='" + objCourseId.CourseId + "'and type =1";
SqlConnection sqlCon = new SqlConnection();
sqlCon.ConnectionString = strConnection;
sqlCon.Open();
SqlCommand sqlCom = new SqlCommand();
SqlDataAdapter da = new SqlDataAdapter(strSql, sqlCon);
try
{
da.Fill(ds);
}
catch (Exception exce)
{
strErr = exce.ToString();
}
finally
{
sqlCon.Close();
}
if (ds.Tables[0].Rows.Count != 0)
{
return(1);
}
else
{
return(0);
}
}
